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Flowerlike ZnCo2O4 microspheres were synthesized using Ni foam substrates by a facile hydrothermal method combining post-annealing treatments. The obtained microspheres are about 5μm in diameter and composed of porous ultrathin nanosheets. And the supercapacitors based on these microspheres show a high specific capacitance (689.4F/g at the current density of 1A/g), good rate performance (336.6F/g...
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